"Crusher" Crock was one of the finest athletes in the world, excelling at any sport he cared to try. Crock was so obsessed by winning that he would do almost anything to win, no matter how unsporting or brutal he had to be. Finally after he permanantly crippled an opponent during a professional football game, Crock found himself banned from all sports. It was at this time that he decided to use his sporting abilities for crime.

Disguised as the leader of a "Mystery" Polo team he tried to rob the spectators of the Polo match. However, he and his accomplices were thwarted by Alan (Green Lantern) Scott.

At the end of that battle it appeared that Crock had accidentally fallen to his death, but sometime later he returned as the Sportsmaster, determined once again to use his abilities for crime. Setting explosives at several Gotham City sporting events, Sportsmaster demanded ransom money of he would trigger them causing death and carnage. He was eventually captured by Green Lantern and sent to prison.

Escaping from Prison, Crock joined the Injustice Society and battled the JSA. One of his fellow team members was the Huntress and the two eventually married, becoming a criminal team. He planned their robberies, and she would capture any heroes who tried to interfere. It took the combined efforts of Black Canary and Starman (Ted Knight) to thwart them.